Hermissenda emurai
Distribution
Description
Previously thought to be Hermissenda crassicornis and now understood to be a separate species occuring in Japan and Russian Far East. Body is orange-hued and much more elongate than H. crassicornis (Alaska to Northern California) and H. opalescens (Sea of Cortez to Northern California). Cerata have brown to light orange background which may or may not exhibit reddish or brown tips. Gaps between cerata are much longer than the other two species, and longitudinal stripe between rhinophores is dark orange.
Information
Max Size: N/A cm
Sea Temperature Range: N/A
Depth: N/A
Habitat Generalization Index: N/A
Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.
Conservation and Rarity
IUCN Status: Not Evaluated
Occurrence: Widespread (60% of sites)
Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed
Abundance: Solitary (1 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Jo Schmid